Massachusetts Senator Elizabeth Warren and progressive allies have reportedly stalled President Obama’s plans to nominate a financial regulator with ties to Wall Street. Politico reports Obama was planning to tap corporate attorney Keir Gumbs to fill a Democratic seat on the Securities and Exchange Commission. But activists protested Gumbs’ record, including his work representing the American Petroleum Institute before the SEC. Gumbs is a partner at the corporate law firm Covington & Burling — the same firm to which former Attorney General Eric Holder has just returned after leaving the Justice Department. Earlier this year, Gumbs and colleagues at the firm wrote a guide advising corporations on how to avoid disclosing their political spending to shareholders. Senator Warren wants the SEC to require companies to disclose such spending. Protests by her and others have now reportedly delayed Gumbs’ nomination, at least until August. We’ll talk more about Holder, Gumbs and their law firm with Matt Taibbi later in the broadcast.